Take up reel slip device



Oct. 20, 1931. A. KINDELMANN ET AL 1,827,893

TAKE-UP REEL SLIP DEVICE.

Filed July 22, 1930 INVENTORS ATTORNEY Patented Oct. 20, 1931 UNITED STATES PATENT OFFICE ALBERT KINDELMANN, Of FLORAL PARK, AND EWA'LD BOECKING, O]: BROOKLYN,

NEW YORK, ASSIGNOBS TO INTERNATIONAL PROJECTOR CORPORATION, OF NEW YOBK,.N. Y., A CORPORATION OF DELAWARE TAKE REEL SLIP :oEvIcn Application filed July 22, 1930. Serial No. 469,658.

This invention relates to take-up devices, and more particularly to an automatic tensioning mechanism for winding :1. flexible provides a take-up mechanism for winding a member on a reel.

The invention is particularly applicable to a motion picture projection machine, and

film on the film reel and maintaining the correct tension thereon regardless of the size 0 weight of the film.

An object of the invention is to provide a mechanism for maintaining a constant tension on a flexible element, such as a film when it is being wound on a reel.

Another object is to provide a mechanism in which the weight of the reel automatically controls the force applied to the film during the winding operation.

A still further object is to provide a mechanism in which the winding force is automatically varied directly as the weight of the reel.

Another object is to provide a mechanism of the above character in which the ratio of the force transmitted through the winding mechanism with respect to the weight of the reel may be varied at will.

Another object is to provide'a cheap, simple, dependable and convenient device of the type above indicated.

The invention also consists in certain new and original features of construction and combinations of parts hereinafter set forth and claimed.

Although the novel features which are believed to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the invention itself, as to its objects and advantages, the mode of its operation and the manner of its organization may be better understood by referring to the following description taken in connection with the accompanying drawing forming a part thereof, in which Figure 1 is a transverse sectional view of a take-up mechanism constructed in accordance with the present invention.

In the following description and in the claims ,parts will be identified by specific names for convenience, but they are intended to be as generic in their application to similar parts as the art will permit.

Referring to the drawing more in detail, the invention is shown as applied to a reeling device for a film reel 10, which comprises a shaft 11 on which said reel is secured as by pin 12, which is mounted in a collar 13 pinned to said shaft and cooperates with a suitable aperture on said reel. The reel is held in engagement with pin 12 by means of a latch 15, which is pinned to the end of shaft 11, and is provided with a cam surface 16 which cooperates with a plunger 17 held in the end of shaft 11, and maintained in engagement with said cam surface by spring 18. 'A film 19, or'other flexible element, may be supported on reel 10.

Shaft 11 is mounted in bearin 20 for pivotal and'rotational movement. aid bearing is preferably of the anti-friction type, 'as for example, asball bearing, and is secured in a tubular member 21 which is slidably mounted in housing 22. Said member 21 is controlled by pin 23 which engages a suitable bore in said member and passes through a slot 24 in housing 22. Said pin is held in collar 25 which is in threaded engagement with shaft 27. Said shaft 27 is journalled in sections 28 and 29, which form apart of the frame of the machine.

Longitudinal movement of shaft 27 is prevented by collars 30, which are mounted there- ,on and engage section 28 of the frame. A

sprocket 31 is secured to said shaft and is in engagement with a chain 32. which passes over sprocket 33 mounted on shaft 34. Said shaft 34 is journalled in section 35 forming a part of the frame of the machine, and is provided with a hand wheel 36 which adjustment thereof may be made. Said shaft 34 is held in correct longitudinal position by shoulder 37 formed on wheel 36 and by collar 38 which is pinned to said shaft.

Shaft 11 is held against angular displace- 1 I ment in a horizontal direction and also against longitudinal displacement by means of hearing member 40, which is provided with an.

elongated or U-shaped opening to permit vertical movement of said shaft therein; Said member 40 is secured to frame section 29 by means of set screws 41, and is secured to housing 22 b. screw 42. A bushing 43 is mounted on t e shaft 11 in engagement with hearing member 40, and is adapted to permit rotational movement of said shaft and pivotal movement in a vertical direction, but to cooperate with the elongated slot in bearing member 40 to prevent pivotal movement of said shaft in a horizontal direction. Collars 44 and 45 engage bearing member 40 to prevent longitudinal movement of shaft 11.

A driving wheel 46 having an inner surface 47 of frusto-conical shape is secured to a shaft 11 as by hub member 48 which is pinned thereto. For drivingsaid wheel there is provided a friction member 50, which is pinned to shaft 51. Said shaft is journalled in sleeve 52, which is slidably mounted in suitable bore in the frame member 29. Said shaft is slidably keyed to driving gear 53, as by a key 54, which permits longitudinal movement of said shaft with respect to gear 53, but prevents relative rotational movement therebetween. Said shaft is also jour- .nalled in a bore 60 in frame section 28.

WVasher 61 is mounted on shaft 51 between section 28 and gear wheel 53 to prevent direct contact between said wheel and said frame member.

Sleeve 52 is provided with a shoulder 62 against which spring 63 is seated for normally holding said sleeve in engagement with a collar 64 pinned on shaft 51. The tension of said spring is in such direction that the pressure exerted by said spring on sleeve 52 and shaft 51 holdsmember in engagement with surface 47 of driving wheel 46. A ratchet 65 formed on sleeve 52 engages a pawl 66 which is adapted to permit movement of sleeve 52 in one direction in response to spring 63, but to prevent movement in the reverse direction. Said pawl 66 is held by spring 67 infirm engagement with said ratchet.

, Power may be applied to gear 53 from any suitable source, as by driving gear 70, and friction member 50 may be lined with any suitable friction material such as leather by which the friction thereof on the conical surface of driving wheel 46., may be more accurately controlled. A suitable casing 71 for the reel 10 may be mounted on a housing 22,-

as by plate 72. Said casing terminates in a flange 73 which surrounds shaft 11 and prevents the entrance of extraneous materials into housing 22.. Wall 74. forming a part of a wall of the apparatus, is provided with an .,opening 75 through which housing 22 projects and is attached to a portion 77 of the frame of the machine. Rod 77 is provided at its end with a" groove 78 to receive a tool for afiecting manual adjustment. A plurality of recesses 79 are formed in driving wheel 46 both for the purpose of lightening said wheel and to permit access of a suitable tool to groove 78.

In the operationof the above described sys- 50 and 46.

tem, it will be noted that-the weight of the material, such as film 19 on reel 10, causes shaft 11 to pivotin bearing 20 whereby driving wheel 46 is caused to exert pressure on friction member 50. The driving torque is accordingly applied to shaft 11 from driving gear 7 0 through gear 53, shaft 51, friction member 50 and driving wheel 46. The amount of frictional'driving force thus applied is determined by the pressure of wheel 46 on friction member 50, and this in turn is determined by theweight of the material supported on reel 10. It is evident, therefore, that the driving force is directly proportional to the weight of said material, and in the case of a motion picture machine is proportional to the diameter of the film supported on reel 10. This ratio is such that the film is maintained under substantially constant tension regardless of the driving force exerted on gear 53.

As the friction surface of member 50 becomes worn, said member is held in engage- .ment with wheel 46 by the action of spring 63 on sleeve 52 and shaft 51, which causes longitudinal movement of said shaft. Whenever such movement of shaft 51 is taking place, pawl 66 and ratchet 65 fcooperate to maintaln said shaft in operative position so that the engagement of member 50 with wheel 46 is not dependent upon the force of spring 63. This prevents longitudinal movement of shaft 51 in response to variations in pressure of wheel 46 as the mechanism is operated.

In order to vary the force applied to the driving shaft for any given'weight of vmaterials supported on reel 10, the hand wheel 36 may be manually adjusted thereby ro tating shaft 34 and shaft 27 and causes longitudinal movement of collar 25 and bearing 20 with respect to housing 22, such movement,

36 when the machine is .operating, and an extremely fine adjustment may be malntained by reason of the engagement of threaded rod 27 with collar 25. Suchadjustment may become necessary, for example, in changin from one weight of reel to a reel of a di ferent weight or by a variation in the condition of the frictional surfaces of members While certain novel features of the invention have been shown and described and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes in the forms and details of the device illustrated and in its operation may be made by those skilled in the art without departingfrom the spirit of the invention.

What is claimed is 1. A reeling device comprising asubstantially horizontal shaft, a bearing supporting said shaft for rotational and vertical movement, a friction element carried by said shaft and a cooperating friction element'in'driving engagement therewith, the arrangement being such that the weight of material on said shaft tends .to cause pivotal movement thereof,-whereby said friction elements are maintained in frictional engagement, and repensating for wear of the friction surfaces. 3. A reeling device comprising a rotatingshaft mounted for pivotal movement in a verticalplane in response to the weightof the material being reeled, a driving shaft mounted in substantially parallel relationship to said first shaft, and friction driving -means comprising friction elements carried on said shafts and having tapered surfaces in frictional engagement, and means for causing longitudinal movement of said driving shaftwith respect to said first shaft whereby said friction surfaces are adjusted to co n pensate for wear.

4. A reeling device comprising ahorizon- 'tal shaft mountedfor pivotal movement in a vertical plane in response, to the weight of the material being reeled, a driving shaft therefor mounted in substantial parallelism to said first-shaft, friction driving means interconnecting said shafts comprising friction elements mounted on each of said shafts, and having cooperating frusto-conical surfaces, and resilient means for causing relative longitudinal movement of said shafts in-such direction that said conical surfaces are maintained in frictional contact regardless of the extent of wear thereon.

5. A reeling device 'comprising a horizontal' shaft mounted for pivotal movement in a vertical plane in response to the weight of the material being reeled, a drivi' fig shaft therefor mounted in substantial parallelism to said first shaft. friction driving; means tion elements mounted on each said shafts, and having cooperating frusto-conical surfaces, and resilient means for causing relative longitudinal movement of said shafts in such direction that said conical surfaces are main- 'tained in frictional contact regardless of the extent of wear'thereon, and means for'locksubstantially parallel to said first shaf5, and

,adapted to cooperate with said first menthe parts may be restored to their original friction element mounted on said driving ing said elements a ainst movement in a direction which woul tend to lessen the friction therebetwe'en.

6. A reeling device comprising a rotating shaft adapted to support a reel, a bearing for mounting said shaft for rotational and pivotal movement, a friction element carried by said shaft and having an internal tapered friction surface, a ,drivin shaft mounted a friction element mounted on said driving shaft and having an external tapered surface adapted to cooperate with said first mentioned tapered surface, the arrangement being such that the weight of the material being reeled tends to cause pivotal movement of said first shaft for maintaining pressure between said frictional surfaces, whereby a driving force is transmitted which is proportional to the weight of said material. I

7. A reeling device'comprising a rotating shaft adapted to support a'reel, a bearing for a mounting said shaft for rotational and pivotal movement, a'friction element carried by said shaft and having an internal tapered friction surface, a driving shaft mounted substantially parallel to said first shaft, and a friction element mounted on said driving shaft and having an external tapered surface tioned tapered surface, said external surface having a lining of soft friction ma" erial thereon whereby the wear is concentrated and condition by replacement 'of said lining, the arrangement being such that the weight of the material being reeled tends to cause pivotal movement. of said first shaft for maintaining pressure/between said frictional surfaces, whereby a driving force is transmitted which is proportional to the weight of said material. h

8. A reeling device comprising a rotating. shaft adapted to support a reel, a bearing for mounting said shaft for rotational and pivotal movement, a friction elemen t\ carried by said shaft and having an internal tapered friction surface, a driving shaft mounted sub-. stantially parallel to said first shaft, and a shaft and having an external tapered surface adapted to cooperate with said first mentioned tapered surface, said external surface" having a lining. of soft friction material thereon whereby thewear is concentrated and the parts .may ,be restored to their original interconnecting said shafts comprising fr ccondition-byreplacement of Said lining the arrangement being such that the weight of the material'being reeled tends to cause piviotal movement of said first slraftfor main- --taining pressure between said frictional surfaces, whereby a driving force is transmitted which is proportional to" the weight of said material, and means for causing longitudinal 130 relative movement between said-friction surfaces is obtained to compensat'e'for wear.

- 9. A reeling device comprising a rotating shaft adapted to support a reel, a bearing for mounting said shaft for rotational and pivotal movement, a friction element carried by sa d shaft and having an internal tapered friction surface, a driving shaft mounted substantially parallel to said first shaft, and a friction element mounted on said driving shaft and having an external tapered surface I adapted to cooperate with said first mentioned tapered surface, 'said external surface havmg a llning of soft friction material thereon whereby the wear is concentrated and 3,

tially horizontal shaft,.a bearing supporting the parts may be restored to their original condition by replacement of said lining, the

arrangement being suchthat the weight of the material beingreeled tends to cause piv-' otal movement of said first shaft for maintaining pressure between said frictional sur-' faces, whereby a driving force is transmitted which is proportionalto the weight of said material, and resilientrmeans for causing longitudinal movement of said driving shaft in a direction to maintain said friction surfaces in constant engagement.

10. A reeling device comprising a'rotating shaft adapted to support a reel, a bearing for mounting said shaft for rotational and plvotal movement, a friction element carried by said shaft and having an internal tapered friction surface, a driving shaft mounted substantially parallel to said' first shaft, and a friction element mounted on said drlving shaft andhavin g an external tapered surface adapted to cooperate with said first mentioned tapered'surface, said external surface having a lining of soft friction material thereon whereby the wear is concentrated and the parts may be restored to their origlnal condition by replacement of said lining,

. the arrangement being such that the weight of the material being reeled "tends to cause pivotal movement of said first shaft for maintaming pressure between said frictional surfaces, whereby a driving force is transmitted which is proportional to the weight of said material, resilient means for causing longitudinal movement of said drlvlng shaft for maintainlng said friction surfaces in engagement, and locking means for preventing reverse movement of said driving shaft.

11. A reeling device comprising a rotatingshaft adapted to support a reel, a bearing for mounting said shaft for rotational and pivotal movement, a friction element carried by said shaft and having an internal tapered friction surface, a driving shaft mounted substantially parallel to said first shaft, and a friction element mounted on said driving shaft and having an external tapered surface adapted to cooperate with said first mentioned tapered surface, said external surface having a lining of soft friction material thereon whereby the wear'is concentrated and the parts may be restored to their original condition by replacement of said lining, the arrangement being such that the weight of the material being reeled tends to cause pivotal movement of said first shaft for maintaining pressure between said frictional surfaces, whereby a driving force is transmitted which is proportional to the weight of said material, a spring adapted to cause longitudinal movement of said driving shaft for maintaining said surfaces in engagement, and a pawl and ratchet adapted to lock said shaft against reverse movement.

' 12. A reeling device comprising a substansaid shaft for rotational and pivotal movement, and means for adjusting said bearing longitudinally of said shaft, comprising a threaded shaft mounted substantially parallel to said first shaft and carrying a threaded collar, and means interconnecting said collar with, said bearing whereby upon rotation of said threaded shaft longitudinal movement of said bearing is obtained.

13. A reeling device comprising a substantially horizontal shaft, a bearing supporting said shaft for rotational and pivotal movement, and means for adjusting said bearing longitudinally of said shaft, comprising a threaded shaft mounted substantially parallel to said first shaft and carrying a threaded collar, and means interconnecting said collar with said bearingwhereby upon rotation of said threaded shaft longitudinal shaft and said threaded shaft.

14. A reeling device comprising a rotating shaft adapted to support a reel, a friction element carried on said shaft and a bearing mounted between said reel and said friction element and ada ted to permit pivotal movement of said s aft in a vertical plane, a housing, means for mounting said bearing therein for slidable movement longitudmally of said shaft, a threaded shaft mounted adjacent said housing and parallel thereto, a threaded collar mounted on said threaded shaft and having a member extending through aislot in said housing into engagement with said bearing, means for rotating said threaded rod whereby longitudinal movement of said collar and of said bearing is obtained for varying the lever arms of said reel and said friction member with respect to said bearing.

15. A reeling device comprising a rotating a shaft adapted to support a reel, a friction element carried on said shaft and a bearing mamas element and adapted to permit pivotal movement of said sha t in a vertical plane, a housing, means for mounting said bearing therein for slidable movement longitudinally of said shaft, a threaded shaft mounted adjacent said housing and parallel thereto, a threaded collar mounted on said threaded shaft and.

having a member extending through a slot said housing into engagement with said bearing, means for rotating said threaded rod whereby longitudinal movement of said collar and of said bearing is' obtained for varying thelever arms of said reel and said friction member with respect to said bearing, comprising a sprocket wheel carried on said threaded rod, a chain cooperating said wheel, and a control sprocket in engagement with said chain, and said-control sprocket being mounted on a shaft located at a distance from said threaded rod, and carrying a hand adjusting wheel mounted in an accessible position.

16. A reeling'device comprising a rotating shaft adapted to carry thematerial bein reeled, a bearing for mounting said sha for rotational and pivotal movement, a housing carrying said heating, and a thrust bearing for said shaft comprising a member having an elongated opening mounted in said housing, said opening being ada ted to permit vertical movement of said 5 aft and to prevent appreciable horizontal movement thereof, a driving shaft extending substantially parallel to said first shaft, friction elements interconnectin said-shafts, said elements having tapered surfaces in frictional engagement, means for causing longitudinal movement of said second shaft or compensat- 1 ing for wear of said surfaces, and-means for ad usting said bearing longitudinally of said first shaft for varying theratio of the lever 7 arms of said reel, andsaid friction member comprising a threaded member connected to said bearing in enga ement with a threaded rod extending par e1 to said shaft, and

means for rotatino-said threaded rod comprising a chainand ative means for controlling said chain.

In testimony whereof we have hereunto set our hands. a Y

ALBERT EWALD BOECKING.

with

sprocket and hand oper- 

